It is normal to complain about their investment not getting the expected results. There is no one who does not want to benefit from what they have put in while working. This happens a lot because they invest simply because they follow what other people are doing, and end up just falling victim to the hype.
Investors should take their decision by themselves. But most of them follow other people or group before investing their money in any coin. These type of investors become the victim of price dip like this and starts to complain. The manipulators only says to invest, they doesn't tell anything to the investor about the risk. So, do your own research and analyze the market properly. It will help to not getting trapped during huge dip.